發(fā)布時間：2018-10-09 09:14

【摘要】：空間配準是計算機輔助骨科手術的關鍵步驟,配準精度直接影響導航效果。本文針對基于二維圖像的視覺配準方法,通過理論分析和計算機仿真,研究該方法常用的雙平面定位標尺標記點分布拓撲對定位精度的影響,得到了標記點間距、數(shù)目等因素對定位精度的影響規(guī)律,給出了定位誤差在空間上的分布特點。研究表明,增加標記點的數(shù)目和間距有助于減小定位誤差;并且,在包絡外接圓半徑相等時,五點四邊形的分布拓撲方式較四點矩形和四點三角形更優(yōu)。
[Abstract]:Spatial registration is a key step in computer aided orthopaedic surgery, and the accuracy of registration directly affects the navigation effect. In this paper, aiming at the visual registration method based on two-dimensional image, through theoretical analysis and computer simulation, the influence of the distribution topology of marking points on the positioning accuracy is studied, and the distance between marking points is obtained. The influence of the number and other factors on the positioning accuracy is discussed, and the distribution characteristics of the positioning error in space are given. It is shown that increasing the number and spacing of marking points is helpful to reduce the location error, and that the distribution topology of five-point quadrilateral is better than that of four-point rectangle and four-point triangle when the radius of envelope outer circle is equal.
【作者單位】： 北京航空航天大學生物與醫(yī)學工程學院;
【基金】：國家高技術研究發(fā)展計劃(863計劃)項目(2015AA043201)
【分類號】：R687;TP391.7

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本文編號：2258809